Christopher Bell rises to the top of the NASCAR Power Rankings heading into the Round of 12

It's probable that few of the forecasters gave Christopher Bell much of a chance to advance far in the playoffs when they filled out their NASCAR playoff brackets.

If they didn't, though, they were being very naive. Bell has plenty of experience with NASCAR's playoff system because he qualified for the Championship 4 in each

of his full-time Trucks and Xfinity seasons, including the 2017 season in which he won the Truck Series. He has achieved career highs in top fives (10) and top 10s (17),

in addition to a win at New Hampshire and three pole positions, making this season the greatest of his Cup career. These statistics were greatly enhanced by Bell's strong

performance in the Round of 16. Christopher Bell now occupies the top spot in the CBS Sports NASCAR Power Rankings after finishing fifth, third, and fourth

 in the Round of 16 and moving on to the Round of 12. Bell just needed to move up one point to take over the top spot in the Power

Rankings, but after a wild, attrition-filled race at Bristol, there was a lot of movement both up and down. Four drivers moved up by

seven slots or more, with Bristol winner Chris Buescher (+10) moving up the most among all drivers. Martin Truex Jr. suffered the

largest loss of all, falling from 10th in the Power Rankings all the way down to 21st following another mechanical issue. Five drivers lost seven positions or more.